# Gelidium

Gelidium est un genre d'algues rouges (Rhodophyta) de la famille des Gelidiaceae. Il comprend 124 espèces, connues sous plusieurs noms communs. La taille des espèces est généralement comprise entre 2 et 40 cm. Leurs ramifications sont irrégulières, ou en rangées de part et d'autre du thalle principal. Gelidium produit des tétraspores.
Ce sont des algues très importantes pour la production mondiale d'agar-agar.

## Liste d'espèces

Selon AlgaeBase (22 août 2017) :
* Gelidium abbottiorum R.E.Norris
* Gelidium affine Schiffner (Statut incertain)
* Gelidium amamiense Tanaka & K.Nozawa
* Gelidium amansii (J.V.Lamouroux) J.V.Lamouroux
* Gelidium ambiguum Piccone & Grunow
* Gelidium amboniense Hatta & Prud'homme van Reine
* Gelidium americanum (W.R.Taylor) Santelices
* Gelidium anthonini J.V.Lamouroux
* Gelidium applanatum Stegenga, Bolton & R.J.Anderson
* Gelidium arborescens N.L.Gardner
* Gelidium arbusculum Bory ex Børgesen
* Gelidium arenarium Kylin
* Gelidium asperum (C.Agardh) Greville
* Gelidium attenuatum (Turner) Thuret
* Gelidium australe J.Agardh
* Gelidium bernabei A.J.K.Millar & D.W.Freshwater
* Gelidium bipectinatum G.Furnari
* Gelidium bulae Schnetter
* Gelidium canariense (Grunow) Seoane-Camba ex Haroun, Gil-Rodríguez, Díaz de Castro & Prud'homme
* Gelidium cantabricum Seoane-Camba
* Gelidium capense (S.G.Gmelin) P.C.Silva
* Gelidium caulacantheum J.Agardh
* Gelidium ceramoides Levring
* Gelidium chilense (Montagne) Santelices & Montalva
* Gelidium clavatum (J.V.Lamouroux) J.V.Lamouroux
* Gelidium claviferum Kützing
* Gelidium concinnum Baardseth
* Gelidium congestum W.R.Taylor
* Gelidium coreanum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo
* Gelidium corneum (Hudson) J.V.Lamouroux (espèce type)
* Gelidium coronadense E.Y.Dawson
* Gelidium corrigerum J.V.Lamouroux
* Gelidium coulteri Harvey
* Gelidium crinale (Hare ex Turner) Gaillon
* Gelidium crispum M.Howe
* Gelidium deciduum E.Y.Dawson
* Gelidium declerckii Tronchin
* Gelidium decompositum Setchell & Gardner
* Gelidium delicatulum (Kützing) Setchell
* Gelidium elegans Kützing
* Gelidium elminense Dickinson
* Gelidium eucorneum K.M.Kim, I.K.Hwang, J.K. Park & S.M.Boo
* Gelidium fasciculatum Hamel
* Gelidium filicinum Bory
* Gelidium flaccidum P.J.L.Dangeard
* Gelidium floridanum W.R.Taylor
* Gelidium foliaceum (Okamura) E.M.Tronchin
* Gelidium foliosum P.J.L.Dangeard
* Gelidium galapagense W.R.Taylor
* Gelidium hancockii W.R.Taylor
* Gelidium heterocladum Papenfuss
* Gelidium hildenbrandtii (Hauck) F.Schmitz
* Gelidium hirsutum (Okamura) G.H.Boo & R.Terada
* Gelidium hommersandii A.J.K.Millar & D.W.Freshwater
* Gelidium howei Acleto
* Gelidium hypnosum Zanardini ex R.Molinier (Statut incertain)
* Gelidium hystrix Zanardini (Statut incertain)
* Gelidium inagakii Yoshida
* Gelidium indonesianum K.M.Kim, G.S.Gerung & S.M.Boo
* Gelidium inflexum Baardseth
* Gelidium intertextum P.Dangeard
* Gelidium isabelae W.R.Taylor
* Gelidium japonicum (Harvey) Okamura
* Gelidium jejuense K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo
* Gelidium johnstonii Setchell & N.L.Gardner
* Gelidium kintaroi Yamada
* Gelidium latiusculum Okamura
* Gelidium lineare Iha & Freshwater
* Gelidium lingulatum Kützing
* Gelidium linoides Kützing
* Gelidium longipes J.Agardh
* Gelidium longiramulosum (Y.P.Lee & B.S.Kim) G.H.Boo
* Gelidium maggsiae Rico & Guiry
* Gelidium maidenii A.H.S.Lucas
* Gelidium masudae B.M.Xia & C.K.Tseng
* Gelidium mcnabbianum (E.Y.Dawson) B.Santelices
* Gelidium microdentatum E.Y.Dawson
* Gelidium microdon Kützing
* Gelidium microdonticum W.R.Taylor
* Gelidium microglossum A.L.Grusz & Freshwater
* Gelidium microphyllum (Crosby-Smith) Kylin
* Gelidium microphysa Setchell & N.L.Gardner
* Gelidium micropterum Kützing
* Gelidium millarianum G.H.Boo, Hughey, K.A.Miller & S.M.Boo
* Gelidium minimum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo
* Gelidium minusculum (Weber-van Bosse) R.E.Norris
* Gelidium multifidum Greville
* Gelidium nova-granatense W.R.Taylor
* Gelidium nudifrons N.L.Gardner
* Gelidium obtusum Schousboe (Sans vérification)
* Gelidium omanense M.J.Wynne
* Gelidium pacificum Okamura
* Gelidium parvulum Greville
* Gelidium planiusculum Okamura
* Gelidium pluma Bornet ex N.H.Loomis
* Gelidium pristoides (Turner) Kützing
* Gelidium profundum Tronchin & Freshwater
* Gelidium proliferum Kützing
* Gelidium prostratum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo
* Gelidium pseudointricatum Skottsberg & Levring
* Gelidium pteridifolium R.E.Norris, Hommersand & Fredericq
* Gelidium pulchellum (Turner) Kützing
* Gelidium pulchrum N.L.Gardner
* Gelidium pulvinatum Thuret ex Bornet (Statut incertain)
* Gelidium purpurascens N.L.Gardner
* Gelidium pusillum (Stackhouse) Le Jolis
* Gelidium pygmaeum (Lightfoot) Lyngbye (Sans vérification)
* Gelidium reediae N.H.Loomis
* Gelidium refugiense (E.Y.Dawson) Santelices
* Gelidium regulare Baardseth
* Gelidium reptans (Suhr) Kylin
* Gelidium rex Santelices & I.A.Abbott
* Gelidium rigens (C.Agardh) Greville ex Kützing
* Gelidium robustum (N.L.Gardner) Hollenberg & I.A.Abbott
* Gelidium rugosulum Schousboe (Sans vérification)
* Gelidium samoense Reinbold
* Gelidium sclerophyllum W.R.Taylor
* Gelidium secundatum Zanardini ex Kützing
* Gelidium seminudum J.Agardh
* Gelidium semipinnatum Piccone & Grunow
* Gelidium senegalense Feldmann
* Gelidium sentosaense G.H.Boo, Y.Cai & S.M.Boo
* Gelidium serpens J.Agardh
* Gelidium serra (S.G.Gmelin) E.Taskin & M.J.Wynne
* Gelidium serrulatum J.Agardh
* Gelidium sinicola N.L.Gardner
* Gelidium spathulatum (Kützing) Bornet
* Gelidium spinosum (S.G.Gmelin) P.C.Silva
* Gelidium subfastigiatum Okamura
* Gelidium tenue Okamura
* Gelidium tenuifolium Shimada, Horiguchi & Masuda
* Gelidium torulosum Kützing
* Gelidium tsengii K.-C.Fan
* Gelidium umbricola E.Y.Dawson & Neushul
* Gelidium undulatum N.H.Loomis
* Gelidium usmanghanii Afaq-Husain & M.Shameel
* Gelidium vagum Okamura
* Gelidium venetum Schiffner
* Gelidium venturianum E.Y.Dawson
* Gelidium versicolor (S.G.Gmelin) J.V.Lamouroux
* Gelidium vietnamense Pham-Hoàng Hô
* Gelidium vittatum (Linnaeus) Kützing
* Gelidium yamadae K.-C.Fan
* Gelidium yoshidae G.H.Boo & R.Terada
Selon ITIS (22 août 2017) :
* Gelidium amansii
* Gelidium americanum (W. Taylor) Santelices
* Gelidium arborescens Gardn.
* Gelidium caloglossoides
* Gelidium cartilagineum
* Gelidium corneum (Hudson) Lamouroux
* Gelidium coronadense
* Gelidium coulteri Harv.
* Gelidium crinale
* Gelidium deciduum
* Gelidium decompositum
* Gelidium irregulare
* Gelidium johnstoni
* Gelidium latifolium (Greville) Bornet & Thuret
* Gelidium microphysa
* Gelidium nudifrons Gardn.
* Gelidium pluma
* Gelidium pulvinatum
* Gelidium purpurascens Gardn.
* Gelidium pusillum (Stackhouse) Le Jolis
* Gelidium pyramidale
* Gelidium reediae
* Gelidium rigidum
* Gelidium robustum Gardn.
* Gelidium sclerophyllum
* Gelidium sesquipedale
* Gelidium sinicola
* Gelidium sonorense
* Gelidium vittatum (L.) Kütz.
Selon World Register of Marine Species (22 août 2017) :
* Gelidium abbottiorum R.E.Norris, 1990
* Gelidium aculeatum (Greville) Batters
* Gelidium affine Schiffner
* Gelidium amamiense Tanaka & K.Nozawa, 1965
* Gelidium amansii (J.V.Lamouroux) J.V.Lamouroux, 1813
* Gelidium ambiguum Piccone & Grunow, 1884
* Gelidium amboniense Hatta & Prud'homme van Reine, 1991
* Gelidium americanum (W.R.Taylor) Santelices, 1976
* Gelidium anthonini J.V.Lamouroux, 1813
* Gelidium applanatum Stegenga, Bolton & R.J.Anderson, 1997
* Gelidium arborescens N.L.Gardner, 1927
* Gelidium arbusculum Bory de Saint-Vincent ex Børgesen, 1927
* Gelidium arenarium Kylin, 1938
* Gelidium asperum (C.Agardh) Greville, 1830
* Gelidium attenuatum (Turner) Thuret, 1892
* Gelidium australe J.Agardh, 1872
* Gelidium bernabei A.J.K.Millar & D.W.Freshwater, 2005
* Gelidium canariense (Grunow) Seoane Camba ex Haroun, Gil-Rodríguez, Díaz de Castro & Prud'homme van Reine, 2002
* Gelidium cantabricum Seoane-Camba, 1979
* Gelidium capense (S.G.Gmelin) P.C.Silva, 1987
* Gelidium caulacantheum J.Agardh, 1876
* Gelidium ceramoides Levring, 1949
* Gelidium chilense (Montagne) Santelices & Montalva, 1983
* Gelidium clavatum (J.V.Lamouroux) J.V.Lamouroux, 1813
* Gelidium claviferum Kützing, 1849
* Gelidium coarctatum Kützing, 1868
* Gelidium concinnum Baardseth, 1941
* Gelidium congestum W.R.Taylor, 1947
* Gelidium coreanum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo, 2012
* Gelidium corneum (Hudson) J.V.Lamouroux, 1813
* Gelidium coronadense E.Y.Dawson, 1953
* Gelidium corrigerum J.V.Lamouroux, 1813
* Gelidium coulteri Harvey, 1853
* Gelidium crinale (Hare ex Turner) Gaillon, 1828
* Gelidium crispum M.A.Howe, 1914
* Gelidium deciduum E.Y.Dawson, 1953
* Gelidium declerckii Tronchin, 2005
* Gelidium decompositum Setchell & Gardner, 1924
* Gelidium delicatulum (Kützing) Setchell, 1924
* Gelidium elegans Kützing, 1868
* Gelidium elminense Dickinson, 1952
* Gelidium eucorneum K.M.Kim, I.K.Hwang, J.K. Park & S.M.Boo, 2011
* Gelidium fasciculatum G.Hamel, 1928
* Gelidium filicinum Bory de Saint-Vincent, 1828
* Gelidium flaccidum P.J.L.Dangeard, 1951
* Gelidium floridanum W.R.Taylor, 1943
* Gelidium foliaceum (Okamura) E.M.Tronchin, 2002
* Gelidium foliosum P.J.L.Dangeard, 1951
* Gelidium galapagense W.R.Taylor, 1945
* Gelidium hancockii W.R.Taylor, 1945
* Gelidium heterocladum Papenfuss, 1947
* Gelidium hildenbrandtii (Hauck) F.Schmitz, 1894
* Gelidium hommersandii A.J.K.Millar & D.W.Freshwater, 2005
* Gelidium howei Acleto, 1973
* Gelidium hypnosum Zanardini ex R.Molinier, 1960
* Gelidium hystrix Zanardini
* Gelidium inagakii Yoshida, 1997
* Gelidium indonesianum K.M.Kim, G.S.Gerung & S.M.Boo, 2011
* Gelidium inflexum Baardseth, 1941
* Gelidium intertextum P.Dangeard, 1949
* Gelidium isabelae W.R.Taylor, 1945
* Gelidium japonicum (Harvey) Okamura, 1901
* Gelidium jejuensis K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo, 2012
* Gelidium johnstonii Setchell & N.L.Gardner, 1924
* Gelidium kintaroi Yamada, 1941
* Gelidium latiusculum Okamura, 1935
* Gelidium lingulatum Kützing, 1868
* Gelidium linoides Kützing, 1868
* Gelidium longipes J.Agardh, 1876
* Gelidium macnabbianum (E.Y.Dawson) B.Santelices, 1998
* Gelidium madagascariense Andriamampandry, 1988
* Gelidium maggsiae Rico & Guiry, 1997
* Gelidium maidenii A.H.S.Lucas, 1935
* Gelidium masudae B.M.Xia & C.K.Tseng, 2002
* Gelidium microdentatum E.Y.Dawson, 1960
* Gelidium microdon Kützing, 1849
* Gelidium microdonticum W.R.Taylor, 1969
* Gelidium microglossum A.L.Grusz & Freshwater, 2014
* Gelidium microphyllum (Crosby-Smith) Kylin, 1934
* Gelidium microphysa Setchell & N.L.Gardner, 1930
* Gelidium micropterum Kützing, 1868
* Gelidium minimum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo, 2012
* Gelidium minusculum (Weber-van Bosse) R.E.Norris, 1992
* Gelidium multifidum Greville, 1833
* Gelidium musciforme (W.R.Taylor) Santelices, 1991
* Gelidium nova-granatense W.R.Taylor, 1971
* Gelidium nudifrons N.L.Gardner, 1927
* Gelidium obtusum Schousboe
* Gelidium omanense M.J.Wynne, 2004
* Gelidium pacificum Okamura, 1914
* Gelidium parvulum Greville, 1833
* Gelidium planiusculum Okamura, 1935
* Gelidium pluma Bornet ex N.H.Loomis, 1960
* Gelidium pristoides (Turner) Kützing, 1843
* Gelidium profundum Tronchin & Freshwater, 2007
* Gelidium proliferum Kützing, 1868
* Gelidium prostratum K.M.Kim, I.K.Hwang, H.S.Yoon & S.M.Boo, 2012
* Gelidium pseudointricatum Skottsberg & Levring, 1941
* Gelidium pteridifolium R.E.Norris, Hommersand & Fredericq, 1987
* Gelidium pulchellum (Turner) Kützing, 1868
* Gelidium pulchrum N.L.Gardner, 1927
* Gelidium pulvinatum (Kützing) Thuret ex Bornet
* Gelidium purpurascens N.L.Gardner, 1927
* Gelidium pusillum (Stackhouse) Le Jolis, 1863
* Gelidium pygmaeum (Lightfoot) Lyngbye
* Gelidium reediae N.H.Loomis, 1960
* Gelidium refugiensis (E.Y.Dawson) Santelices, 2007
* Gelidium regulare Baardseth, 1941
* Gelidium reptans (Suhr) Kylin, 1938
* Gelidium rex Santelices & I.A.Abbott, 1985
* Gelidium rigens (C.Agardh) Greville ex Kützing, 1849
* Gelidium robustum (N.L.Gardner) Hollenberg & I.A.Abbott, 1965
* Gelidium rugosulum Schousboe
* Gelidium samoense Reinbold, 1907
* Gelidium sclerophyllum W.R.Taylor, 1945
* Gelidium secundatum Zanardini ex Kützing, 1869
* Gelidium seminudum J.Agardh, 1841
* Gelidium semipinnatum Piccone & Grunow, 1884
* Gelidium senegalense Feldmann
* Gelidium serpens J.Agardh, 1854
* Gelidium serra (S.G.Gmelin) E.Taskin & M.J.Wynne, 2013
* Gelidium serrulatum J.Agardh, 1847
* Gelidium sinicola N.L.Gardner, 1927
* Gelidium spathulatum (Kützing) Bornet, 1892
* Gelidium spinosum (S.G.Gmelin) P.C.Silva, 1996
* Gelidium subfastigiatum Okamura, 1933
* Gelidium tenue Okamura, 1934
* Gelidium tenuifolium Shimada, Horiguchi & Masuda, 2000
* Gelidium torulosum Kützing, 1868
* Gelidium tsengii K.-C.Fan, 1961
* Gelidium umbricola E.Y.Dawson & Neushul, 1966 †
* Gelidium undulatum N.H.Loomis, 1960
* Gelidium usmanghanii Afaq-Husain & M.Shameel, 1996
* Gelidium vagum Okamura, 1934
* Gelidium venetum Schiffner, 1938
* Gelidium venturianum E.Y.Dawson, 1958
* Gelidium versicolor (S.G.Gmelin) J.V.Lamouroux, 1813
* Gelidium vietnamense Pham-Hoàng Hô, 1969
* Gelidium vittatum (Linnaeus) Kützing, 1843
* Gelidium yamadae K.-C.Fan, 1951